# 例7：if语句多个条件
num = 9
if num >= 0 and num <= 10:  # 判断值是否在0~10之间
    print('hello')  # 输出结果: hello
num = 10
if num < 0 or num > 10:  # 判断值是否在小于0或大于10
    print('hello')
else:
    print('undefine')  # 输出结果: undefine
num = 8  # 判断值是否在0~5或者10~15之间
if (num >= 0 and num <= 5) or (num >= 10 and num <= 15):
    print('hello')
else:
    print('undefine')  # 输出结果: undefine